Guest Stars Gary Jones as Sgt. Walter Harriman Tony Amendola as Master Bra'tac Garry Chalk as Col. Chekhov David Hewlett as Dr. Rodney McKay Neil Denis as Rya'c Christopher Kennedy as Dr. Larry Murphy Co Starring Dan Shea as Sgt. Sylvester Siler David Palffy as Anubis Tobias Mehler as Lt. Graham Simmons Aleks Paunovic as Shaq'rel Michael Soltis as Medic Ivan Cermak as Cpt. Hagman Carrie Ritchie as Technician Craig McNair as Technician